Stock stop for metalworking machines



Aug. -7, 1945.

A. E. DRISSNERETAL sTocK sToP FOR METAL WORKING MACHINES 5 Sheets-Sheet 1 IIIIIIIIIH Flled Oct L llllll TCFHII Aug. .7, 1945.

A. E. DRISSNER ETAL s'rocx STOP FOR METAL woRKlNG MACHINES Filed oct. '7, 1945 5 sheetseshegt 2 u b1 1i- TL ,\.l 4\\ 1\ TV o mlm 5 Sheets-Shet 3' .11.lblllll l E ma@ y m,

FiledV Oct 7',v 1945 Aug. 7, 1945. E. DRLSS'R ErAL STQCK ST'OP FOR METAL WORKING MACHINE? ,'Aug. 7, 1945,.

A. E. DRissNER a-rAL 24,381,441

STOCK SITOP FOR' METAL WORKING MACHINES Filed Ot; 7, 1945 5 SlleeS-Sheetl 4 'TQ-2L V16 l Aug. 7 1945" A. E. DRlssNER Erm. 2,381,441

sToGK'sToPFoR METAL WORKING MACHINES `Filed Oct. '7, 1943 5 Sheets-Sheet 5 v`Patented 7, 1945 STOCK STOP AFOR METALWORKING l Alfred E. Drissner and William J.l Hogg, Cleveland, .Ohio,..assignorsyto The National Acme` Company, -Cleveland, Ohio, a corporation of Ohio l Application october 7', 194s, seria1N0.505,z94

,liClaima ,Thisinvention relates to 'animprovement in stoclr stopsformetal working machines vsuch as :pipeooupling tapping machines andhas for its principal object'the provision of a stock` stop yorworl: positioning means which will be simple infconstruction, eilicient in use and 'comparatively inexpensive to manufacture.l

Erfurt-her object of the present "invention is the provision of means which,l in combination with the stock stop, will facilitate the removal of the finished Vwork piece prior to the operation of V'thestop to position a new piece to be oper-k *AIn the' drawings 'accompanying and'v forming ampartof this specilcatior'i.--`

"Fig. 1 is a front elevation ofy the lower part of a tapping machine illustrating the present invention; v A M j f "Figa `2 is a side elevation thereof. g Fig. 3 isa verticalsection of the stop and its operating means but somewhat enlarged'.`r

` Fig.4 is a horizontal sectionon the line'` 4--4 Fig. 5is a section onJ line 5-5 of Fig. 2.

v Fig. 6'is a horizontallfsection as on line -t of Fig. v 7: 3

` Fig. 7 is a detail of the rconstruction of the stop,

Fig. E is alayouty of* the fluid control system` Similar characters of 4reference `indicate correspondingr parts in theseveral views.

v Before explaining' in detail the present im provement and its mode of operation,v We desire -to have it understood that the invention isfnot limited Ato the details of construction andarrangement of parts lillustrated in theaccompanying drawings since the .invention is capable 'ofpther embodiments, and that the phraseology I vemployed is `for the purpose of descriptionand y not ofjlimitation V,This invention vis anvimprovement upon that Vshown and described in the A. E. Drissner et al. lPatent 2,206,031, and only ,so much thereof as is deemed necessary herein vrfor anunderstanding of the present invention has been illustrated and described and reference is made to that patent fora fulldisclosure of the operationof thecomplete `machine. rv Since, in .this niachine,"they chuck is indexed, it is essential that ,they stop `have considerable movement in orderr not to interfere with the .'i'ndex'ing'off'the chuck and asjce'rtain sizes or lengthsof Work pieces require that ther stop yreach inside Athe chuck, it `has been found that n 'the swingingstopfof the "patent Vreferred tois the swinging. damper employed in v sometimes impractical.` Therefore; to overcome the disadvantages of thatA stop, the present improved stop has been designed which can have a very great travel and readily rreach inside chuck.

'This improved stock stop 2 is located directly under and in line with the worl holding chuck 3 and is designed to move in an up and down-or vertical direction.

The stop is supported inside thebase of kthe machine by suitable legs 4 set at an angle and so'shaped that 'chips readily fall ofi, the legs 4 being suitably secured to the base off'the machine. Y In the present improvement, the stop-is hydraulically controlled for raising and lowering it and comprises a'supporting frame Bhousing the cylinder 5' having therein a piston 6 at the vtop of which the stop I is suitably and removably secured'by means of the screws il. Other kstops may be substituted whendesired for dii'erent sizes and `shapes of work pieces to-be operated upon.

Located? belowk the stop 'l-and also movable with the piston 6 is an extension ,9 provided with suitable'vrods Iii projecting through openings II of lugs-or extensions I2 of thecylinder supporting frame. These rods are threaded at their lower ends for the reception of nuts I3 which are adjustable to'regulate or limit the up stroke of the pistonl 6. l

Suitably securedr to thefront of the cylinder frame' by a supporting arm or bracket I4 is a block I5 having atop surface I6 tapered toward the rear of the machine. This block is positioned yslightly above the stop `'i when in its lowered 'position `and the stop 'l has at its rear a bevand strikesthe beveled surface I6 or l1 or both,

thereby being tipped so that it will fall toward the rear and drop into an inclined curved chute I8 suitably secured to the frame of the machine and be carried out the back of the. machine.

' This chute,.together with the beveled surfaces on the stop and block eliminate the necessity ofv vthe herein-` before mentioned .patent In the operationfof the present improvement,`

at the proper time when it is desiredr to open the chuck, the lever I9 (see Fig. 8)v is released for operation and the operation of this. lever` I9 acts on a iour-Wayvalve 20 causing fluid yto pass through the line A to one end, as 2|, of the chuck operating cylinder to effect the opening thereof to release the workpiece which drops on the yblock or chute I8.

After the chuck has been opened, pressure is built up in this line which extends-to the pilot operated Valve '22 through the line A. On the end of this Valve 22 is a pre-ssure controlled pilot E which, when adjustable pressure is applied, allows fluid in the line B from a hydraulic pump to pass through the valve 22 into the line C connected with the bottom of the cylinder 5 which moves the piston 6 Carrying the stock stop I upward into position properly to locate anew work piece within the chuck 3. Thus, it will be observed that, after the chuck is opened, there is sufficient delay to permit the finished Work piece to be disposed of before the stop is again moved into operating position.

After the stop has been 'moved into position toreceive a new piece of work, the lever I9 is released which causes the valve 20 to be opened in the opposite direction to permit fluid to pass through the line D to the closing side 2| of the chuck operating ,cylinder to. close the chuck on the new piece.

The stock stop stays in its upward position until the chuck is closed whereupon pressure is built up in the line extending to the other end of the pilot valve 22 which also has on this end another pressure controlled pilot F' which, when adjustable pressure is applied, causes the valve to operate in the opposite direction causing uid from the line B to pass through theline G to the top of the cylinder 5' a-nd effect a lowering ofthe piston 6 and thereby the stop 'L After this has been accomplished, the interlocked machine operating lever is again released so that the operator can start the machine operating through its series of cycles to operate on a new piece.

While the beveled surfaces I6 and I1 and the shape of the curved chute are more practicable for certain sizes of couplings or castings yet the shape of these or any of them may be varied or eliminated for other sizes. In short, the work stop is moved vertically to a predetermined position to abut the lower end of the Work before it is clamped in the chuck. It is, therefore, receded before the work is threaded or otherwise operated upon, When the chuck is opened, the finished work drops down and when it contacts the sloping surfaces I6 and `I1, it is rdeected downwardly into the curved chute I8.

Itisto be understood that, by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of our said invention and described a way ofccnstructing and using the same, although without attempting to set forth all of the forms in which it stop and is tipped into the may be made, or all of the modes of its use, we

2. In a metal working machine having a horizontally positioned work holding chuck, a stock stop located below the chuck and vertically shiftable toward the chuck to position a work piece therein, and means for facilitating the removal of the work when the stop is in inoperativeposition, said means comprising a member havingr a tapered top surface cooperating with a tapered top surface on said stop and an inclined chute cooperatingwith said tapered top Surfaces. Y

3. In a metal working machine having a horizontally positioned work holding chuck, a stock stop located below the chuck and vertically shiftable toward the chuck to position a work piece therein, and means for facilitating the removal of the work when the stop is in inoperative position, said means comprising a member having a tapered top surface cooperating with a tapered top surface on said stop and fluid means for shifting said stop.

4. A metal working machine having a hori- Zontally positioned work holding chuck, a stock stop located below the chuck and vertically shiftable toward the chuck to position a work piece therein, means for opening and closing the chuck, means forshifting the stop into and out of operative position, and means cooperating with the stop for facilitating removal of the work.

5. A metal working machine having a horizontally positioned work holding chuck, a stock stop located below the chuck and vertically shiftabletoward the chuck to position a work piece therein, means for opening and closing the chuck, means for shifting the stop into and out of operative position, and means cooperating with the stop for facilitating removal of the Work, said last means comprising a member having a tapered surface cooperating with a tapered surface provided on said stop.

6. A metal working machine having a horizontally positioned work holding chuck, a stock stop located below the chuck and vertically shiftable toward the chuck to position a Work piece therein, means for opening and closing the chuck, means for shifting the .stop into and out .of operative position, means cooperating with the stop for facilitating removal of the work, said last means comprising a member having a tapered surface cooperating -with a tapered surface provided on said stop and an inclined chute cooperating with said inclined surfaces.

7. In a metal working machine, the combination of a horizontally positioned work holding chuck, a stock stop located below the chuck vertically shiftable toward the chuck for positioning a work piece therein, means for opening and closing said chuck and shifting the stop into and out of operative position in timed sequence whereby the stop will have a delayed action, and means cooperating with the stop for facilitating removal of the finished work piece.

8. In a metal working machine, the combination of a horizontally positioned work holding chuck, a stock stop located below the chuck vertically shiftable `toward the chuck for positioning a Iwork piece therein, means for opening and closing said chuck and shifting the stop into and out of operative position in timed sequence wherebythe stopwill have a delayed action, and means cooperating with the stop for facilitating removal of the nished work piece and comprising amember having a tapered top surface cooperati-ng with a tapered top surface provided on said stop. l

9. In a machine having a horizontally positionedworkholding chuck, a stock stop located below the chuck and vertically shiftable toward the chuck for positioning a Work piece therein,

lmeans yfor opening and closing the chuck, means 10. In a metal Working maclhine having a horizontally positioned Work holding chuck, a

stock stop located below thechuck and shiftable vertically toward the chuckto abut a Work piece to `position it in the chuck, and uidoperated vmeans comprising a piston carrying said stop adjacent to its upper end for shifting saidA stop vertically. n

11. In a metal vvorking machine having a horizontally positioned work holding chuck, a stock vstop located below the chuck and shiftable ver- .tically toward the chuck a-nd adapted to abut a Work piece to position it in the chuck, means for shifting said stop, and means cooperating with the stop for facilitating the removal of the Work when the stop is in inoperative position.

12. In a metalworking machinehaving a horizontally positioned Work holding chuck, a stock stop located below the chuck i-n inoperative position a distance "greater-than the radius of ther chuck and shiftable vertically transversely of the chuck through a distance approximately equal to the radius of the chuck to a point'adjacent to the chuck` to permit positioning a Work piece therein,'and means for shifting it.

ALFRED E. nRIssNER. W'LLLIAM J. HOGG. 

